Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1499817 | Scripta Materialia | 2011 | 4 Pages |
Abstract
The plastic deformation of several orientations of a monocrystalline NiTi shape memory alloy was investigated via nanoindentation. The onset of plasticity, indicated by a pop-in, was used to determine the activation volume for each orientation. Unlike other reports, we found the activation volume to be dependent on orientation; in particular, the (1 0 0) orientation had an activation volume double that of the (1 1 0) and (1 1 1) orientations. This is attributable to different recoverable transformation strain behaviors. These observations illuminate the deformation mechanisms that may exist in materials that undergo phase transformations.
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Physical Sciences and Engineering
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Authors
Xu Huang, Ainissa G. Ramirez,